// S_StartSound returns the channel index, or -1 if an error occurred
int S_StartSound (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation);
-int S_StartSound_StartPosition (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation, float startposition);
int S_StartSound_StartPosition_Flags (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation, float startposition, int flags, float fspeed);
qboolean S_LocalSound (const char *s);